Two or more nets are on the wire at the same time. The nets are sent down closed, opened by messenger sequentially and fish upward at a certain rate. At a predetermined depth another messenger is sent down to close the nets. A variation on this is to open the nets by messenger and close by flow meter readings. Examples of nets that can be deployed that way include Clarke-Bumpus net, Leavitt net, other opening/closing nets (Wiebe and Benfield 2003, Plates 6 and 8).